APRS - Make It Tea

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====== APRS ======

** VHF and HF APRS **

===== VHF =====

  * FT8900 : 2m I-Gate **GM4SLV-2** - Raspberry Pi, TNC-Pi and APRX I-Gate software
    * **UPDATE 6/4/24 : 2m APRS suspended**. Coverage not adequate from low 2m antenna.
  * TM-D710 in van : **GM4SLV-9** - will digipeat "WIDEn-N"
  * TH-D72 : **GM4SLV-8**
  * Anytone 878
    * analogue : **GM4SLV-7**, 
    * DMR
      * Brandmeister -> PC 234999 (Self-Care set to **GM4SLV-7**)
      * DMR+/Phoenix -> PC 5057 -> **GM4SLV-7**

===== HF =====

  * Occasional use of 30m AFSK 10,147.6kHz USB as **GM4SLV-10**
    * IC-706 and Signalink-USB soundcard


===== Software =====

  * Direwolf
    * HF (300 baud FSK) or VHF soundcard modem/TNC
    * AGW Packet Engine TCP/IP interface to other software
    * standalone iGate and Digipeater
  * Xastir
    * Can use the Direwolf TCP/IP AGW TNC across network
  * WinRPR {{ :public:radio:2024:winrpr_075_2.zip |}}
    * Can act as TCP/IP KISS mode TNC providing 300 or 600 baud Robust Packet TX/RX and also simultaneous 300 baud FSK RX
  * APRSISCE32 {{ :public:radio:2024:aprsis32.zip |}}
    * Can use WinRPR's KISS mode TNC
  * UIView32 {{ :public:radio:2024:32full203.exe |}}
    * Needs to be registered first at [[https://www.apritch.co.uk/uiv32.htm]]
      * <decrypt>U2FsdGVkX18RT21avOp7l4/3U+Z7QxUHE46ZZg3KCJzU5unCrI08T40DgX32Cf+vb09G6DbXBzmXviRFQzEHA+JYusxmxHrb7rd/wXuFDQGmVfn3I9GrL/QCyTpwG6b8GWjBmozR9+Ec5nLbOeKQyVhZMcaRrZTi+FUBEfuxvsRjP/XkHEe58UqXx+ZYKSWOv88WTQajuXm/4LF8mg183g==</decrypt>
    * Can use Direwolf's AGW TNC across network

===== HF Frequencies =====

==== 30m ====
  * 300 Baud FSK RF centre **10149.3kHz**
    * 1700 Hz audio (1600/1800Hz tones)
    * **Dial = 10147.6kHz USB**
      * alternative dial = 10151.0kHz LSB (signal can be inverted without issues)
  * 300 baud RPR RF centre **10148.8kHz**
    * 1500 Hz audio
    * **Dial = 10147.3kHz USB**
      * //Normal// 300 baud AFSK resolves at 2000Hz - and is decoded by WinRPR at this offset


{{:public:radio:2024:screenshot_at_2024-04-10_09-06-39.png?600|}}


=== Direwolf update : 10/04/24 ===

  * Direwolf v1.6 in Debian has a minor annoyance - it decodes its own transmitted frames occasionally due to cross talk in the sound card
  * This is reported to be //fixed in 1.7 release// so I cloned the git repository and built the current 1.7 version
  * It has removed the annoyance of seeing (and reporting to APRS-IS) your own transmitted packets
  * There are other changes and improvements which I will investigate over time.
  * Steps to clone/build

<code bash>
sudo apt-get install libavahi-client-dev
git clone https://www.github.com/wb2osz/direwolf
cd direwolf

mkdir build && cd build
cmake ..
make -j4
</code>

Running the new version 

<code bash>
cd src
./direwolf -c ~/direwolf.conf
</code>

A few red warnings due to changes for v1.7 not being fully compatible with the previous config options, but it runs and doesn't seem to decode its own transmissions any more.

A few tweaks to the config:

<code bash>
ADEVICE  plughw:2,0

CHANNEL 0

MYCALL GM4SLV-10

#MODEM 300 7@30

MODEM 300 B+

#FIX_BITS 1

TXDELAY 50

LOGDIR .

AGWPORT 8000
KISSPORT 8001

PBEACON sendto=0 via="WIDE1-1" delay=0:00 every=10:00 symbol="\-" lat=60^17.31N long=1^25.51W comment="30m HF Direwolf AFSK"

#FILTER 0 0 ( ! d/* )
#FILTER 0 0 (! b/GM4SLV-10 )

#IGSERVER euro.aprs2.net

#IGLOGIN GM4SLV-10 19626

#PBEACON sendto=IG delay=0:30 every=60:00 symbol="\-" lat=60^17.31N long=1^25.51W comment="30m AFSK RX Igate"


DIGIPEAT 0 0 ^WIDE[3-7]-[1-7]$|^TEST$ ^WIDE[12]-[12]$ PREEMPT

#IGTXLIMIT 6 10

</code>

  * I will remove the Debian version 1.6 and ''sudo make install'' the newly compiled v1.7 once I'm happy with it.
  * This version also decodes FX25 packets - which I don't fully understand yet

<code>
SP6PGH-10 audio level = 53   FX.25   75_______
[0.1] SP6PGH-10>APWW11,WIDE1-1:>100639zTest HF APRS station
Status Report, APRSISCE win32 version
Test HF APRS station
[0H] SP6PGH-10>APWW11,GM4SLV-10*:>100639zTest HF APRS station
</code>

  * a normal AX25 packet

<code>
IW4EGP-10 audio level = 46    _|||_____
[0.2] IW4EGP-10>APU25N,WIDE2-2:=4403.57N/01233.72E&APRS HF 30m -/D R-I  H24 {UIV32}<0x0d>
Position, HF Gateway  <= the original primary table definition, UIview 32 bit apps
N 44 03.5700, E 012 33.7200
APRS HF 30m -/D R-I  H24 {UIV32}
[0H] IW4EGP-10>APU25N,GM4SLV-10*,WIDE2-1:=4403.57N/01233.72E&APRS HF 30m -/D R-I  H24 {UIV32}<0x0d>
</code>

  * both of these are also digipeated my me, shown on the last line is my outgoing digipeated packet:
    * ''[0H] SP6PGH-10>APWW11,GM4SLV-10*:>100639zTest HF APRS station''
    * ''[0H] IW4EGP-10>APU25N,GM4SLV-10*,WIDE2-1:=4403.57N/01233.72E&APRS HF 30m -/D R-I  H24 {UIV32}<0x0d>''

--- //John Pumford-Green 21/03/24 16:14//

Last Update : ~~LASTMOD~~



===== Further Information =====


| Direwolf v1.7 User Manual | {{ :public:radio:2024:user-guide_1_.pdf |}} |
| aprs.fi | [[https://aprs.fi/info/a/GM4SLV-10]] |

{{tag>radio aprs}}

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